Kinetics of Phase Transformations in FeAl(Cr,Si) / Fe3Al(Cr,Si) / Fe(Al,Cr,Si) Laminated Coating on the Cr15Al5 Alloy

2020 ◽  
Vol 992 ◽  
pp. 493-497
Author(s):  
Victor Georgievich Shmorgun ◽  
Artem I. Bogdanov ◽  
Vitaliy P. Kulevich ◽  
V.O. Kharlamov
Keyword(s):  
Heat Treatment ◽  
Phase Transformations ◽  
Test Temperature ◽  
Aluminum Content ◽  
Thermal Action ◽  
Layered Coating ◽  
Laminated Coating ◽  
Kinetics Of

The influence of thermal action at 1150 °C on the kinetics of phase transformations in a layered coating FeAl (Cr,Si) / Fe3Al (Cr,Si) / Fe (Al,Cr,Si), obtained using a technology involving aluminizing of an Cr15Al5 alloy by hot dipping in silumin melt AK12M2 and heat treatment. It was shown that after 100 hours of exposure, the visually distinguishable boundary between the coating and the alloy disappears. The aluminum content in the Cr15Al5 alloy increased to 17 at. %, silicon up to 3 at. %, and chromium is reduced to 14 at. %. The microhardness of the alloy increases from 1.6 to 2.4 GPa and survivability at a test temperature of 1150 °C increases from 120 to at least 920 hours.

Influence of the Carbon Content on the Kinetics of Phase Transformations During Continuous Heating from As-Quenched State in a Cr-Mn-Mo Model Alloys / Wpływ Zawartości Węgla Na Kinetykę Przemian Fazowych Podczas Nagrzewania Ze Stanu Zahartowanego W Stopach Modelowych Cr-Mn-Mo

2012 ◽  
Vol 57 (4) ◽  
pp. 943-950 ◽  
Author(s):  
R. Dziurka ◽  
J. Pacyna
Keyword(s):  
Heat Treatment ◽  
Carbon Content ◽  
Phase Transformations ◽  
Continuous Heating ◽  
Chemical Compositions ◽  
Characteristic Points ◽  
Transformation Diagrams ◽  
Kinetics Of

The presented work concerns the research on the kinetics of phase transformations during continuous heating from as-quenched state of three Cr-Mn-Mo model alloys with a different carbon content. The kinetics of phase transformations during continuous heating of investigated alloys was presented on the CHT (Continuous, Heating, Transformation) diagrams. The CHT diagrams were made on the grounds of dilatograms recorded for quenched samples, heated with various rates. Also the methodology of the dilatometric samples preparation and the method of the characteristic points determination was described. The investigated alloys are the model alloys. Taking into account their chemical compositions the possibility of improving their properties by means of the heat treatment can be expected. The investigations of the carbon influence on microstructures of model alloys with Cr-Mn-Mo were carried out. Broadening the knowledge on the carbon influence on the kinetics of phase transformations during continuous heating from as-quenched state, will help in designing new alloys with a better properties.

Transformation of Chemical and Phase Composition in Al/FeAl3(Cr,Ni)/Fe2Al5(Cr,Ni) Laminated Coating at High Temperature Heating

2021 ◽  
Vol 316 ◽  
pp. 833-838
Author(s):  
Victor Georgievich Shmorgun ◽  
Vitaliy P. Kulevich ◽  
Valentin O. Kharlamov
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
Chemical Composition ◽  
Retention Time ◽  
Thermal Action ◽  
Entire Volume ◽  
Laminated Coating ◽  
Temperature Heating ◽  
Kinetics Of ◽  
High Temperature Heating

The effect of thermal action at 1100 °C on the kinetics of phase transformations in the coating, obtained by hot-dip aluminizing of 12Cr18Ni10Ti steel, is studied. It was shown that, after 500 h of exposure, the chemical composition is leveled over the entire volume of the sample. Moreover, the predicted retention time of the heat-resistant properties of the coating at 1100 °C is about 2000 h.

Magnetic Properties, Nanostructure, and Ordering Kinetics of Nb Additive FePtCu Films

2010 ◽  
Vol 638-642 ◽  
pp. 1743-1748
Author(s):  
G.J. Chen ◽  
Y.H. Shih ◽  
Jason S.C. Jang ◽  
S.R. Jian ◽  
P.H. Tsai ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Activation Energy ◽  
Magnetic Properties ◽  
Heating Rates ◽  
Fept Alloy ◽  
Ordering Kinetics ◽  
Nb Content ◽  
Kinetics Of ◽  
Nb Addition ◽  
Microstructure And Magnetic Properties

In this study,the (FePt)94-xCu6Nbx (x=0, 2.87, 4.52, 5.67) alloy films were prepared by co-sputtering. The effects of Nb addition content and heat treatment on the microstructure and magnetic properties of the polycrystalline FePtCu films are reported. Our previous experiments showed that the ordering temperature of the (FePt)94Cu6 films reduced to 320 °C, which is much lower than that of the FePt alloy. However, the grain growth after heat treatment limited the practical application in recording media. By adding the Nb content in the (FePt)94Cu6 film, the grain sizes of the films can be adjusted from 50 to 18nm, even for the films annealed at temperature as high as 600°C. DSC traces of as-deposited disorder films at different heating rates, to evaluate the crystallization of the order phase, revealed that the addition of Nb enhanced the activation energy of ordering from 87 kJ/mol to 288 kJ/mol for the (FePt)94-xCu6Nbx (x=0 and 2.87, respectively) films. The reduction of the grain size and the corresponding increase in the activation energy of the Fe-Pt-Cu-Nb films might result from the precipitation of the Nb atoms around the ordering FePt phase. The (FePt)94-xCu6Nbx (x=2.87) film showed a coercive force of 13.4 kOe and the magnetization of 687 emu/cc.

Kinetics of phase transformations in real finite systems: Application to switching in ferroelectrics

1998 ◽  
Vol 84 (1) ◽  
pp. 445-451 ◽  
Author(s):  
Vladimir Shur ◽  
Evgenii Rumyantsev ◽  
Sergei Makarov
Keyword(s):  
Phase Transformations ◽  
Finite Systems ◽  
Kinetics Of
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